can someone tell me the exact key strokes to solve:
What is x if Log (basex) (8x) = 2arcsec(sqrtx)?
on the ti-83
The weight of a boulder is proportional to the cube of its mean diameter. estimate the diameter of a 30 ton boulder based on the data
(4ft, 2.7 tons), (7ft, 15 tons), (10 ft, 40 tons), and (12 ft, 70 tons).
Please help!
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equation solver problem
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equation solver problem
by smeag » Sun Mar 18, 2012 2:22 pm
Eels always look like they just told a joke, and are waiting for a response.
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Re: equation solver problem
by Fox » Sun Mar 18, 2012 11:01 pm
For the top one, use the 83's solver function (Math, up, enter) and set one side equal to zero.
(I don't have an 83, so I'm not sure how easy it'll be, you might have to use log(8x)/log(x), etc.
For the bottom one, use linear regression.
Stat, edit should work. Make sure to cube the diameters (x values), and use lin reg to find the equation.
Then, solve the equation you get for 30, and cube root. That should do it.
(I don't have an 83, so I'm not sure how easy it'll be, you might have to use log(8x)/log(x), etc.
For the bottom one, use linear regression.
Stat, edit should work. Make sure to cube the diameters (x values), and use lin reg to find the equation.
Then, solve the equation you get for 30, and cube root. That should do it.
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Re: equation solver problem
by FabensMath » Sun Mar 18, 2012 11:17 pm
I was thinking Ln(8x)/Ln(x)-2(cos^-1(sqrt(x)))^-1 = 0, then you set initial value of zero and solve with ALPHA ENTER
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District 3-3A, Region 1
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Re: equation solver problem
by smeag » Mon Mar 19, 2012 6:22 am
I tried typing your exact keystrokes, and it said ERR: BAD GUESS
can you please try them on your own calculator and see what is says?
can you please try them on your own calculator and see what is says?
Eels always look like they just told a joke, and are waiting for a response.
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smeag - Incessant Spammer
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Re: equation solver problem
by FabensMath » Mon Mar 19, 2012 7:28 am
That's true, no idea, maybe try it with an HP?
Fabens High School, Fabens
District 3-3A, Region 1
2012-3A-Calculator State Champ
District 3-3A, Region 1
2012-3A-Calculator State Champ
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FabensMath - Incessant Spammer
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Re: equation solver problem
by Fox » Mon Mar 19, 2012 10:00 am
Bad Guess usually means that your guess (the x=0 part) is outside of the boundaries, (the {-1e99, 1e99} part).
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Re: equation solver problem
by 88bobcat » Mon Mar 19, 2012 3:50 pm
[unparseable or potentially dangerous latex formula]
[unparseable or potentially dangerous latex formula]
[unparseable or potentially dangerous latex formula]
[unparseable or potentially dangerous latex formula]
[unparseable or potentially dangerous latex formula]
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